Thoug an old post it isa t the top.Many projects have linux clients now (pretty much all of BOINC, DIMES etc) Many have MacOS client (PPC and Intel) some like SIMAP and [email protected] have other platforms availabel including x64, Alpha

I am sure everyone knows this advantage of running DC projects on Linux - they don't have to be constantly interupted for reboots (virus scan updates, windows updates, add/remove programs, etc.)! But seriously, interrupting volunteer computing projects for a reboot can cause them to have to redo portions of there calculations because they may "mark there place" in their work unit before they actually stopped.